A Model for Predicting the Rain Backscatter from a 70-GHz Radar.
BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD
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A mathematical model requiring little computer time has been developed to predict the intensity of 70-GHz radar backscatter by rain. The backscatter model is based on an optical radiative transfer model developed under the AMC Target Signature Analysis Program. The described approach was taken in order to develop a backscatter equation independent of the radar frequency so that the equation can be solved by specifying the needed frequency dependent inputs. The backscatter equation is derived and the inputs pertaining to 70 GHz are calculated and presented in the form of graphs and tables. The backscatter equation is then solved and a table generated to predict various backscatter formulations as a function of rainfall rate and distance from the antenna. A discussion of error sources and suggested future research is also included.
- Atmospheric Physics
- Active and Passive Radar Detection and Equipment